Within the depth-psychology corpus, ‘Lake’ operates on at least three distinct registers that rarely collapse into one another. In the I Ching and its Taoist commentarial tradition — the most densely represented strand — Lake (Dui, trigram ☱) functions as a cosmological-alchemical symbol: the youngest daughter, associated with joyfulness, harmonious receptivity, and the yin-culminating reversion to yang. Liu I-ming and the Cleary translation of the Taoist I Ching treat Lake as an active principle of transformation, notably in the hexagrams Change (fire below lake), Gathering (lake above earth), and the Treading hexagram’s meditation on returning the tiger. The image of fire within a lake — moisture and heat balancing each other — becomes a model for the interior work of opposing psychic forces held in productive tension. In Jung’s seminar on Nietzsche’s Zarathustra, the lake takes on an explicitly psychological valence: ‘the lake of his home’ is interpreted, through dream-logic, as the personal unconscious from which the heroic figure departs toward the collective unconscious. Edinger employs the lake idiom eschatologically, quoting Jung’s contrast of ‘a sea of grace’ against ‘a seething lake of fire,’ illustrating the terrible double aspect of the God-image. The present concordance thus maps Lake across cosmological, alchemical, psychological, and theological axes, with the Taoist material constituting the structural core.